The Firm

Mark Halbruner

Law Firm Partner

Serving clients in central Pennsylvania for more than 20 years.

Craig A. Hatch

Law Firm Partner

Certified Elder Law Attorney, practicing in Medical Assistance, Estate Planning and Estate Administration.

Clifton R. Guise

Law Firm Partner

Practicing in the areas of business planning, real estate, corporate, partnership & individual taxation.

Monica L. Ugliuzza

Law Firm Of Counsel

Protecting client’s intellectual property in her federal trademark practice.

Mary-Jo Mullen

Law Firm Of Counsel

Protecting her clients' assets, professional licenses and constitutional rights.

Mary-Jo Mullen

Halbruner, Hatch & Guise, LLP

Phone: (717) 731-9600


Mary-Jo Mullen, CPA, Esq.

Of Counsel

Mary-Jo joined Halbruner, Hatch & Guise, LLP, in January of 2020, after more than 30 years of experience in the private, county government, non-profit and state government sectors.

Bar Admissions and Professional Licenses:

Pennsylvania Supreme Court – 1995

Certified Public Accountant, PA – 1991

Licensed insurance producer, life accident and health – PA -2020

Certified Group Fitness Instructor – AFAA -2011


Juris Doctor – Dickinson School of Law, Carlisle, Pennsylvania – 1995

Bachelor of Science, Accounting, Minor, Business Law– The Pennsylvania State University, State College, Pennsylvania –

Mary-Jo’s practice includes the following areas of law:

Estate Planning

Elder Law

Professional Licensure Representation

Criminal Defense

Here are some highlights of Mary-Jo’s many years of relevant professional experience:

PA House of Representatives
Deputy Chief of Staff for Administration

PA Department of Revenue
Chief, Inheritance Tax and Realty Transfer Tax

PA Insurance Department
Director, Legislative Affairs

PA District Attorneys Association (501(c)(6))/PA District Attorneys Institute(501(c)(3))
Executive Director/Director of Education and Training

Pennsylvania Department of State
Director, Bureau of Enforcement and Investigation (BEI)

District Attorney of Cumberland County
Chief Deputy District Attorney

Pennsylvania Office of Attorney General
Deputy Attorney General, Criminal Law Division

Boyer & Ritter, CPAs
Tax Senior/Research Attorney

Kuntz, Lesher, Seigrist and Martini, CPAs
Tax Senior

Ernst & Whinney, CPAs
Staff Accountant, Audit Department

Personal Life and Hobbies:

Mary-Jo was born in Philadelphia but spent most of her childhood in the South Hills of Pittsburgh when her family moved to Bethel Park. Another family move, this time to the Reading area, occurred during Mary-Jo’s senior year of high school. After college, Mary-Jo spent several years working as a CPA in Wyomissing, PA and preparing to fulfill her lifelong dream of attending law school. After graduating from Dickinson Law, she made a permanent home in Cumberland County and resides in Camp Hill.

Mary-Jo enjoys working out and is a certified group fitness instructor, currently teaching indoor cycling and Zumba. A former state board member of the Ladies Ancient Order of Hibernians, she is active in the local Irish community, and participated for over a decade in the planning and execution of the Harrisburg St. Patrick’s Day parade before the city began to host the event in 2017. Mary-Jo enjoys Irish step dancing along with traditional ballroom, swing and Latin. A lover of all music genres, Mary-Jo dabbles in piano and claims that her job working for a record store during high school and college was her second favorite, slightly behind her position here at HH&G!